SVCHOST.EXE (netsvcs) HIGH CPU

Receiving very little help on this on other forums I frequent, I thought I'd try here. I hope all of this information does not overwhelm.

Here it goes: Hello,

The past couple days I've noticed SVCHOST.EXE start going +50 CPU. For the most part it is sustained. I have linked a screenshot of the services that are running under this instance. I am running Win 7 RC. Right now it's not at a 'sustained' 50 CPU like it was last night, but every 3 or 4 seconds, it pops back up to 50 and then down again a few second later, and iterates like that.

I just did a full Avira AntiVir scan with updated signatures, nothing found. I also run Comodo Firewall with Defense+.

I am looking at the "threads" of the svhost.exe, and it appears that the culprit is ntdll.dll!RtlValidateHeap+0x110 (there are 12 instances, each of which well have over 200,000,000,000 cycles after about 10 minutes of booting up; SCREENIE BELOW). The stack for one of these threads is this: ntoskrnl.exe!KeRemoveQueueEx+0x9da ntoskrnl.exe!KeWaitForMutexObject+0x7c9 ntoskrnl.exe!KeWaitForMutexObject+0x19f ntoskrnl.exe!PoStartNextPowerIrp+0x3a4 ntoskrnl.exe!IoGetSfioStreamIdentifier+0x7ad ntoskrnl.exe!KiCheckForKernelApcDelivery+0x25 ntoskrnl.exe!IoGetConfigurationInformation+0x32b57

Ok,, see this,, if you haven't already. But i think it might be easier to go back to a previous restore point, start uninstalling recently installed programs, or ultimately reload the OS and keep track of what is installed,, programs, Updates, etc. to see if the problem starts again.